APA

Gupta Usha, University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics, Agrawal Rashmi Gu, Murty M N Gu & University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics. (2007). Valuation of urban air pollution. : .

Chicago

Gupta Usha, University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics, Agrawal Rashmi Gu, Murty M N Gu and University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics. 2007. Valuation of urban air pollution. : .

Harvard

Gupta Usha, University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics, Agrawal Rashmi Gu, Murty M N Gu and University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics. (2007). Valuation of urban air pollution. : .

MLA

Gupta Usha, University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics, Agrawal Rashmi Gu, Murty M N Gu and University of Delhi. Faculty of Commerce & Business Studies. Department of Business Economics. Valuation of urban air pollution. : . 2007.